Patents by Inventor Richard A. Ritzenthaler

Richard A. Ritzenthaler has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of making an article having a cast-in place bearing
    Patent number: 4179313
    Abstract: A composite part having freely movable components is manufactured by casting one component around the other to form an essentially locked unit and then freeing the components by thermal treatment.
    Type: Grant
    Filed: December 23, 1977
    Date of Patent: December 18, 1979
    Assignee: N L Industries, Inc.
    Inventors: James H. Koch, Richard A. Ritzenthaler